A TSH test is a blood test used to assess how your thyroid is working. TSH stands for thyroid-stimulating hormone and is produced by the pituitary gland.

What does TSH tell your doctor?

TSH helps regulate how much thyroid hormone your thyroid gland makes. A TSH result that is higher or lower than expected may suggest that further thyroid assessment is needed.

Why are T3 and T4 sometimes tested?

A TSH result cannot by itself explain the cause of a thyroid problem. Depending on your symptoms and results, a doctor may request additional tests such as T4, T3 or thyroid antibodies.

What symptoms can lead to thyroid testing?

Thyroid problems can affect many body functions. Your doctor may consider testing based on symptoms, examination, medical history, medicines, pregnancy-related considerations or previous thyroid disease.

Before a thyroid blood test

Tell your doctor about medicines and supplements you take. Do not stop prescribed medicines unless your healthcare professional tells you to.

Important: This article is general health information and does not replace a consultation, examination or personalised medical advice. If you are unwell or concerned about a test result, speak with a qualified healthcare professional.

Need to discuss your health or test results?

Vanitha Hospital provides family healthcare in Kondalampatti, Salem, with resident doctors and visiting consultants. Call to confirm the appropriate consultation or investigation for you.

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